How to extract values inside brackets in a json string using Java Regex

Question

I would like to use regex to extract the values used inside the second []

[
"Shoes for men wither",
"Shoes for men wither leather",
]

I have tried the following: check all the words between quotes.

 Matcher m = Pattern.compile("\"([^\"]*)\"").matcher(response);

The problem with the above is that it gives me the other values outside the inner array.

I think it's much easier without regex. You need 1st open bracket and then first closing bracket right after. — PM 77-1
– PM 77-1, Commented Nov 21, 2019 at 23:25
You mean just with String.replace() and without using regex? — ErEcTuS
– ErEcTuS, Commented Nov 21, 2019 at 23:27
What I said will give you start and end points for substr() . — PM 77-1
– PM 77-1, Commented Nov 21, 2019 at 23:31
The problem is I don't know the index of the second [ ] as the json output string can vary. it could be [ "abc" [ "def", "ghi"] ], here I want the values "def", "ghi" — ErEcTuS
– ErEcTuS, Commented Nov 21, 2019 at 23:34

Ryan M · Accepted Answer · 2019-11-21 23:58:59Z

1

This looks like JSON, which is not a regular language, and thus can't be parsed reliably with regex. You would almost certainly be better off using a JSON parsing library, such as Gson or one of the many listed at json.org.

answered Nov 21, 2019 at 23:58

Ryan M♦

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2 Comments

ErEcTuS Over a year ago

I agree you are right. How would you put in a Wrapper.java class for this JSON output completion.amazon.com/search/…

Ryan M Over a year ago

If you were using Gson, you'd probably want to decode it with JsonParser.parseString and call getAsJsonArray() on it, and grab the second element of that as a JsonArray as well.

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